A particle of mass $5 × 10^{-5}\  kg$ is placed at lowest point of smooth parabola  $x^2$ = $40y$  ($x$ and $y$ in $m$) (in $rad/s$). If it is displaced slightly such that it is constrained to move along parabola, angular frequency of oscillation will be approximately
  • A$\sqrt 2 $
  • B$10$
  • C$\frac{1}{\sqrt 2}$
  • D$5$
Diffcult
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